MacBook Pro - 4GB RAM worth it??

Well I'm about to purchase my first Mac, and it's going to be a MBP 15', but before I make the final transaction I wanted to get a little more information so..is it worth it to get 4GB RAM? Or should I just stick with the 2GB and upgrade later if I feel like it?

Also on the note of tech specs is it worth to upgrade the processor or is 2.4 Ghz plenty?

yeah, I would upgrade to the 4 gigs but like the user above said, go with it from another company. If you look in your macbook pro manual it shows you how to install the ram (very easy and doesn't void warranty) and it's a lot cheaper. But having 4 gigs of ram is great....makes things a lot smoother